The U.S. aircraft register, updated daily
Engines · piston (reciprocating) · data as of October 8, 2026

Continental IO-520 series

9,484 aircraft on the U.S. register carry a Continental IO-520 series engine, rated at about 285 horsepower. The Beechcraft V35 Bonanza is the model most often fitted with it (1,496 aircraft). The aircraft carrying it were built between 1963 and 2017.

The FAA records engines by code, usually at the level of a series ("O-320 series") rather than the exact variant; this page gathers every FAA code that reads as Continental IO-520 series. FAA spelling: IO 520 SERIES.

When the aircraft were built by decade

By decade built, as a table
aircraft
194012
195037
19602,627
19704,534
19801,114
1990189
20005
20102

What the FAA has certified, ordered and been told about the Continental IO-520 series the component layer

The design is held under 1 type certificate (E5CE, held by Continental Aerospace Technologies, INC.). The FAA has issued 30 airworthiness directives (orders that owners must comply with) that name this engine series. Operators and repair shops have filed 465 failure reports with the FAA since 1995, 26 of them in the last ten years.

FAA orders 30 airworthiness directives · newest first

2023-10-262023-17-04 · Reciprocating Engine Oil System · engine
2023-03-152023-05-16 · Reciprocating Engine Power Section · engine
2023-02-232023-04-08 · Reciprocating Engine Power Section · engine
2023-02-172023-02-12 · Engine Air Intake System · engine
2022-08-152022-16-03 · Engine (RECIPROCATING) · engine
2022-03-292022-04-04 · Reciprocating Engine Oil System · engine

All orders naming the Continental IO-520 series

Failure reports 465 since · what operators and shops told the FAA

016314662950005101520224
Failure reports by year, as a table
reports
9515
962
971
981
995
0037
0148
0258
0346
0435
0562
0617
0718
0817
0910
1020
1115
1213
139
1410
1512
164
172
181
192
202
221
242

Parts most often reported as the reports name them

Cylinder26Cylinder Head25Relay20Hub14Circuit Breaker13Antenna12Line12Bolt10Bracket9Control Cable9
Parts most reported, as a table
reports
Cylinder26
Cylinder Head25
Relay20
Hub14
Circuit Breaker13
Antenna12
Line12
Bolt10
Bracket9
Control Cable9

Latest reports

2024-04-06Engine: power loss
2024-04-06Engine: power loss
2022-01-21None: none
2020-07-10Rod: broken
2020-01-15Turnbuckle: corroded

Certificates and bulletins

E5CEType certificate held by Continental Aerospace Technologies, INC. · 18 models listed · revised March 8, 2022

Safety bulletins 11 · advice, not orders

2020-04-06NE-20-05 · POWERPLANT - Engine Camshaft Gear Tooth Fracture
2018-06-20NE-18-16 · POWERPLANT Alternator Drive Coupling
2017-05-10NE-17-11 · POWERPLANT Engine damage as a result of kickback
2016-03-08NE-16-13 · Powerplant - Prohibited use of sealant
2013-02-08NE-13-15 · Engine Controls: Continental Motors, Inc. (CMI) Throttle and Mixture Control Levers

Sources: the FAA's type certificate data sheets, airworthiness directives, supplemental type certificates, special conditions and special airworthiness information bulletins (Dynamic Regulatory System), and the FAA's service difficulty reports. A failure report is what an operator or repair station chose to file; the counts show reporting as much as reliability, and larger and commercial fleets report more. How the systems are grouped.

Connections how this engine series links to the rest of the register

Fitted to
Where they are
Biggest operators
Airworthiness

The whole map of how records connect · these connections as data: /graph/engine/continental-io-520-series.json.

Aircraft newest certificates first · 9,484

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N93JE Cessna
210L
Fixed-wing, single engine Sibora Group LLC
Gilbert, Arizona
Standard 2019-02-04 ValidFAA registration status code V: Valid registration. All codes
N185EL Cessna
A185E
Fixed-wing, single engine Kimmel Aviation Insurance Agency INC
Greenwood, Mississippi
Standard 2019-02-02 ValidFAA registration status code V: Valid registration. All codes
N17MA Beech
S35
Fixed-wing, single engine Co-owned owner
Mississippi
Standard 2019-02-01 ValidFAA registration status code V: Valid registration. All codes
N1744X Cessna
210L
Fixed-wing, single engine Dodson International Parts INC
Rantoul, Kansas
Standard 2019-01-31 ValidFAA registration status code V: Valid registration. All codes
N4595S Beech
V35B
Fixed-wing, single engine Individual owner
Georgia
Standard 2019-01-31 ValidFAA registration status code V: Valid registration. All codes
N678JR Beech
V35B
Fixed-wing, single engine Co-owned owner
Texas
Standard 2019-01-31 ValidFAA registration status code V: Valid registration. All codes
N517SA Cessna
U206A
Fixed-wing, single engine Halo for Freedom Warrior Foundation
Willow Park, Texas
Standard 2019-01-30 ValidFAA registration status code V: Valid registration. All codes
N21914 Beech
V35B
Fixed-wing, single engine Autumn Air LLC
Prescott, Arizona
Standard 2019-01-29 ValidFAA registration status code V: Valid registration. All codes
N2777J Cessna
A185E
Fixed-wing, single engine First Flight LLC
Craig, Alaska
Standard 2019-01-29 ValidFAA registration status code V: Valid registration. All codes
N70TC Cessna
210
Fixed-wing, single engine Two Ten Bravo Delta LLC
Kaiser, Missouri
Standard 2019-01-29 ValidFAA registration status code V: Valid registration. All codes
N92503 Cessna
A185F
Fixed-wing, single engine Individual owner
Oregon
Multiple 2019-01-29 ValidFAA registration status code V: Valid registration. All codes
N72027 Cessna
U206D
Fixed-wing, single engine Candy Corn LLC
Missoula, Montana
Standard 2019-01-22 ValidFAA registration status code V: Valid registration. All codes
N185SK Cessna
A185F
Fixed-wing, single engine Gulf Sierra Aviation LLC
Owasso, Oklahoma
Standard 2019-01-18 ValidFAA registration status code V: Valid registration. All codes
N822GS Beech
E-55
Fixed-wing, multi-engine Co-owned owner
West Virginia
Standard 2019-01-18 ValidFAA registration status code V: Valid registration. All codes
N1883F Cessna
210F
Fixed-wing, single engine Co-owned owner
Texas
Standard 2019-01-17 ValidFAA registration status code V: Valid registration. All codes
N6FB Beech
A36
Fixed-wing, single engine Co-owned owner
Louisiana
Standard 2019-01-17 ValidFAA registration status code V: Valid registration. All codes
N100RB Beech
F33A
Fixed-wing, single engine Individual owner
North Carolina
Standard 2019-01-16 ValidFAA registration status code V: Valid registration. All codes
N1349G Cessna
310R
Fixed-wing, multi-engine Wings of Grace Ministries INC
Melbourne, Florida
Standard 2019-01-16 ValidFAA registration status code V: Valid registration. All codes
N2712T Beech
95-C55
Fixed-wing, multi-engine Individual owner
Pennsylvania
Standard 2019-01-16 ValidFAA registration status code V: Valid registration. All codes
N5028R Cessna
A185F
Fixed-wing, single engine Individual owner
Michigan
Standard 2019-01-16 ValidFAA registration status code V: Valid registration. All codes
N70391 Cessna
A185F
Fixed-wing, single engine Sutton Aircraft Salvage LLC
Palmer, Alaska
Multiple 2019-01-15 ValidFAA registration status code V: Valid registration. All codes
N87KT Bellanca
17-30A
Fixed-wing, single engine Individual owner
Texas
Standard 2019-01-15 ValidFAA registration status code V: Valid registration. All codes
N365AC Beech
B36TC
Fixed-wing, single engine Evalidate LLC
Birmingham, Michigan
Standard 2019-01-14 ValidFAA registration status code V: Valid registration. All codes
N700ED Beech
V35B
Fixed-wing, single engine Mcd Aviation INC
Wilmington, Delaware
Standard 2019-01-14 ValidFAA registration status code V: Valid registration. All codes
N7523N Beech
36
Fixed-wing, single engine Individual owner
California
Standard 2019-01-14 ValidFAA registration status code V: Valid registration. All codes
N8143J Beech
F33A
Fixed-wing, single engine Fly Girl Aviation LLC
Little Rock, Arkansas
Standard 2019-01-14 ValidFAA registration status code V: Valid registration. All codes
N2862W Beech
V35B
Fixed-wing, single engine Bonanza 62W LLC
Richmond, Indiana
Standard 2019-01-10 ValidFAA registration status code V: Valid registration. All codes
N7388R Beech
A36
Fixed-wing, single engine Co-owned owner
Florida
Standard 2019-01-10 ValidFAA registration status code V: Valid registration. All codes
N916N Beech
35-C33A
Fixed-wing, single engine Co-owned owner
California
Standard 2019-01-10 ValidFAA registration status code V: Valid registration. All codes
N250ML Beech
F33A
Fixed-wing, single engine Alpha Aero Repair LLC
Dousman, Wisconsin
Standard 2019-01-09 ValidFAA registration status code V: Valid registration. All codes
N281AR Beech
58
Fixed-wing, multi-engine Individual owner
Tennessee
Standard 2019-01-09 ValidFAA registration status code V: Valid registration. All codes
N3101T Cessna
310R
Fixed-wing, multi-engine Mission Air LLC
Charlotte, North Carolina
Standard 2019-01-09 ValidFAA registration status code V: Valid registration. All codes
N9566Q Beech
V35
Fixed-wing, single engine Co-owned owner
Wisconsin
Standard 2019-01-09 ValidFAA registration status code V: Valid registration. All codes
N1KY Beech
E33C
Fixed-wing, single engine Catherines Aviation Services LLC
Sewanee, Tennessee
Standard 2019-01-08 ValidFAA registration status code V: Valid registration. All codes
N14782 Bellanca
17-30A
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2019-01-07 ValidFAA registration status code V: Valid registration. All codes
N7987R Beech
V35A
Fixed-wing, single engine Hopeful Monster LLC
Ann Arbor, Michigan
Standard 2019-01-07 ValidFAA registration status code V: Valid registration. All codes
N10007 Cessna
210G
Fixed-wing, single engine Individual owner
Nebraska
Standard 2019-01-02 ValidFAA registration status code V: Valid registration. All codes
N342S Beech
A36
Fixed-wing, single engine Individual owner
Arkansas
Standard 2019-01-02 ValidFAA registration status code V: Valid registration. All codes
N311SK Cessna
310R
Fixed-wing, multi-engine Individual owner
New York
Standard 2018-12-31 ValidFAA registration status code V: Valid registration. All codes
N70358 Cessna
A185F
Fixed-wing, single engine Individual owner
Washington
Standard 2018-12-31 ValidFAA registration status code V: Valid registration. All codes
N4651S Beech
A36
Fixed-wing, single engine Individual owner
California
Standard 2018-12-28 ValidFAA registration status code V: Valid registration. All codes
N300SA Beech
F33A
Fixed-wing, single engine Individual owner
Florida
Standard 2018-12-27 ValidFAA registration status code V: Valid registration. All codes
N814JC Beech
95-C55
Fixed-wing, multi-engine Sports Medicine Consulting LLC
Midlothian, Virginia
Standard 2018-12-27 ValidFAA registration status code V: Valid registration. All codes
N1542U Cessna
U206F
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-12-26 ValidFAA registration status code V: Valid registration. All codes
N64PH Beech
S35
Fixed-wing, single engine Conklin Diana J
Kirksville, Missouri
Standard 2018-12-26 ValidFAA registration status code V: Valid registration. All codes
N211MW Beech
E-55
Fixed-wing, multi-engine Individual owner
Tennessee
Standard 2018-12-20 ValidFAA registration status code V: Valid registration. All codes
N2730A Beech
A36
Fixed-wing, single engine Individual owner
Virginia
Standard 2018-12-20 ValidFAA registration status code V: Valid registration. All codes
N94NM Cessna
TU206F
Fixed-wing, single engine Individual owner
Washington
Standard 2018-12-20 ValidFAA registration status code V: Valid registration. All codes
N5996F Cessna
210H
Fixed-wing, single engine L M W Leasing
Midlothian, Texas
Standard 2018-12-19 ValidFAA registration status code V: Valid registration. All codes
N129M Cessna
A185F
Fixed-wing, single engine Individual owner
Arizona
Standard 2018-12-18 ValidFAA registration status code V: Valid registration. All codes
N389S Beech
V35B
Fixed-wing, single engine Individual owner
Texas
Standard 2018-12-18 ValidFAA registration status code V: Valid registration. All codes
N185GH Cessna
A185F
Fixed-wing, single engine Individual owner
Texas
Standard 2018-12-17 ValidFAA registration status code V: Valid registration. All codes
N9723E Bellanca
17-30A
Fixed-wing, single engine Individual owner
Texas
Standard 2018-12-17 ValidFAA registration status code V: Valid registration. All codes
N185SB Cessna
A185F
Fixed-wing, single engine Individual owner
Washington
Standard 2018-12-12 ValidFAA registration status code V: Valid registration. All codes
N4701K Beech
D55
Fixed-wing, multi-engine Co-owned owner
New Mexico
Standard 2018-12-12 ValidFAA registration status code V: Valid registration. All codes
N919BF Cessna
310R
Fixed-wing, multi-engine Stc Aviation LLC
Wilmington, Delaware
Standard 2018-12-10 ValidFAA registration status code V: Valid registration. All codes
N70MV Beech
V35B
Fixed-wing, single engine Dawson Asset Management and Consulting LLC
Edgartown, Massachusetts
Standard 2018-12-07 ValidFAA registration status code V: Valid registration. All codes
N4607M Beech
58
Fixed-wing, multi-engine Individual owner
Massachusetts
Standard 2018-12-06 ValidFAA registration status code V: Valid registration. All codes
N80MW Cessna
A185F
Fixed-wing, single engine Olde North Church LLC
Wilmington, Delaware
Standard 2018-12-06 ValidFAA registration status code V: Valid registration. All codes
N61092 Cessna
A185F
Fixed-wing, single engine Individual owner
Michigan
Standard 2018-12-04 ValidFAA registration status code V: Valid registration. All codes
N6554V Beech
V35A
Fixed-wing, single engine Xwgnfc LLC
Horsham, Pennsylvania
Standard 2018-12-03 ValidFAA registration status code V: Valid registration. All codes
N3731Q Beech
V35
Fixed-wing, single engine Individual owner
Missouri
Standard 2018-12-01 ValidFAA registration status code V: Valid registration. All codes
N911GS Beech
A36
Fixed-wing, single engine Air-Ric LLC
Mobile, Alabama
Standard 2018-12-01 ValidFAA registration status code V: Valid registration. All codes
N237S Beech
S35
Fixed-wing, single engine Individual owner
Illinois
Standard 2018-11-29 ValidFAA registration status code V: Valid registration. All codes
N442RG Beech
F33A
Fixed-wing, single engine Individual owner
Arizona
Standard 2018-11-29 ValidFAA registration status code V: Valid registration. All codes
N4978F Cessna
U206B
Fixed-wing, single engine Co-owned owner
Oregon
Standard 2018-11-28 ValidFAA registration status code V: Valid registration. All codes
N2785T Beech
V35
Fixed-wing, single engine Individual owner
Louisiana
Standard 2018-11-27 ValidFAA registration status code V: Valid registration. All codes
N311RW Cessna
310R
Fixed-wing, multi-engine Individual owner
North Carolina
Standard 2018-11-27 ValidFAA registration status code V: Valid registration. All codes
N474DL Cessna
310R
Fixed-wing, multi-engine Individual owner
Nevada
Standard 2018-11-27 ValidFAA registration status code V: Valid registration. All codes
N5762K Beech
S35
Fixed-wing, single engine Individual owner
North Carolina
Standard 2018-11-26 ValidFAA registration status code V: Valid registration. All codes
N916RC Beech
V35
Fixed-wing, single engine Dw Aviation LLC
San Diego, California
Standard 2018-11-20 ValidFAA registration status code V: Valid registration. All codes
N334U Beech
F33A
Fixed-wing, single engine Individual owner
Arkansas
Standard 2018-11-16 ValidFAA registration status code V: Valid registration. All codes
N688M Beech
F33A
Fixed-wing, single engine Leading Edge Aviation INC
Bend, Oregon
Standard 2018-11-16 ValidFAA registration status code V: Valid registration. All codes
N5719K Beech
S35
Fixed-wing, single engine Individual owner
Illinois
Standard 2018-11-15 ValidFAA registration status code V: Valid registration. All codes
N114JD Beech
V35B
Fixed-wing, single engine Vintage Motors INC
Beattyville, Kentucky
Standard 2018-11-14 ValidFAA registration status code V: Valid registration. All codes
N3180W Beech
V35B
Fixed-wing, single engine Individual owner
Vermont
Standard 2018-11-14 ValidFAA registration status code V: Valid registration. All codes
N111EY Cessna
A185F
Fixed-wing, single engine Individual owner
Washington
Standard 2018-11-09 ValidFAA registration status code V: Valid registration. All codes
N254WG Cessna
A185F
Fixed-wing, single engine Individual owner
Washington
Standard 2018-11-09 ValidFAA registration status code V: Valid registration. All codes
N72160 Cessna
TU206D
Fixed-wing, single engine Individual owner
Washington
Standard 2018-11-09 ValidFAA registration status code V: Valid registration. All codes
N7914R Beech
V35A
Fixed-wing, single engine Individual owner
California
Standard 2018-11-07 ValidFAA registration status code V: Valid registration. All codes
N4845E Cessna
A185F
Fixed-wing, single engine Individual owner
Illinois
Standard 2018-11-06 ValidFAA registration status code V: Valid registration. All codes
N5696K Beech
S35
Fixed-wing, single engine Co-owned owner
Texas
Standard 2018-11-05 ValidFAA registration status code V: Valid registration. All codes
N673CV Beech
F33A
Fixed-wing, single engine Individual owner
Nebraska
Standard 2018-11-05 ValidFAA registration status code V: Valid registration. All codes
N15WR Cessna
310R
Fixed-wing, multi-engine Acmc Operations LLC
Cedar Park, Texas
Standard 2018-11-03 ValidFAA registration status code V: Valid registration. All codes
N3738Z Beech
A36
Fixed-wing, single engine Ama LLC
Port Orange, Florida
Standard 2018-11-03 ValidFAA registration status code V: Valid registration. All codes
N397MS Cessna
210L
Fixed-wing, single engine Gregory Wm Broburg LTD
Minneapolis, Minnesota
Standard 2018-11-03 ValidFAA registration status code V: Valid registration. All codes
N5422U Beech
95-C55
Fixed-wing, multi-engine Left Base LLC
Austin, Texas
Standard 2018-11-03 ValidFAA registration status code V: Valid registration. All codes
N827TW Cessna
210L
Fixed-wing, single engine Individual owner
Maine
Standard 2018-11-03 ValidFAA registration status code V: Valid registration. All codes
N383MG Cessna
U206G
Fixed-wing, single engine Missionary Air Group
Burlington, North Carolina
Standard 2018-11-02 ValidFAA registration status code V: Valid registration. All codes
N75YA Cessna
210E
Fixed-wing, single engine Individual owner
Texas
Standard 2018-11-02 ValidFAA registration status code V: Valid registration. All codes
N4370W Beech
A36
Fixed-wing, single engine Individual owner
Arizona
Standard 2018-10-31 ValidFAA registration status code V: Valid registration. All codes
N5731J Cessna
P206E
Fixed-wing, single engine Co-owned owner
Wisconsin
Standard 2018-10-31 ValidFAA registration status code V: Valid registration. All codes
N36SE Beech
A36
Fixed-wing, single engine Withheld at owner's request
Standard 2018-10-30 ValidFAA registration status code V: Valid registration. All codes
N52GS Beech
36
Fixed-wing, single engine Lqp Aviation LLC
Gary, South Dakota
Standard 2018-10-30 ValidFAA registration status code V: Valid registration. All codes
N6130R Cessna
T210F
Fixed-wing, single engine Individual owner
Colorado
Standard 2018-10-30 ValidFAA registration status code V: Valid registration. All codes
N70048 Cessna
A185E
Fixed-wing, single engine Trident Resources LLC
Chino Valley, Arizona
Standard 2018-10-30 ValidFAA registration status code V: Valid registration. All codes
N1813Y Beech
F33A
Fixed-wing, single engine Individual owner
California
Standard 2018-10-29 ValidFAA registration status code V: Valid registration. All codes
N206JV Cessna
P206D
Fixed-wing, single engine Individual owner
Montana
Standard 2018-10-29 ValidFAA registration status code V: Valid registration. All codes
N8BN Beech
35-C33A
Fixed-wing, single engine Individual owner
South Carolina
Standard 2018-10-29 ValidFAA registration status code V: Valid registration. All codes
N9033F Beech
F33A
Fixed-wing, single engine Individual owner
Texas
Standard 2018-10-29 ValidFAA registration status code V: Valid registration. All codes
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Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 8, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.